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US 11,932,721 B2Granted
Bio-based polyols, esters, and surfactants
AssigneeRamanathan S. Lalgudi
InventorRamanathan S Lalgudi
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Abstract
The present disclosure relates to methods for making polyols, esters, and surfactants. Generally, a carboxyl-containing molecule is reacted with an epoxide-containing molecule to obtain a hydroxylated ester. If multiple epoxide groups are present in the epoxide-containing molecule, the resulting molecule can also be considered a polyol. The hydroxyl groups can be further ethoxylated to obtain a surfactant/stabilizer.
Claims20
A method of forming polymer particles, comprising:
- heating an initial reaction mixture that comprises at least one hydroxy keto ester, at least one polyhydroxy compound, a polyurethane catalyst, and a dispersion medium, wherein the at least one polyhydroxy compound is not a hydroxy keto ester;
- and
- adding at least one diisocyanate to the initial reaction mixture during the heating to form the polymer particles.
A method of forming polymer particles, comprising:
- heating an initial reaction mixture that comprises at least one diisocyanate, a polyurethane catalyst, and a dispersion medium;
- and
- adding at least one hydroxy keto ester and at least one polyhydroxy compound to the initial reaction mixture during the heating to form the polymer particles, wherein the at least one polyhydroxy compound is not a hydroxy keto ester.
A method for forming a hydroxy keto ester, comprising:
- reacting a carboxyl-containing molecule that also contains at least one carbonyl group with an epoxide-containing molecule in the presence of a catalyst to obtain the hydroxy keto ester;
- wherein the catalyst is a complex between a transition metal and a carboxylic acid.
Dependencies are inferred from the claim text.